Electric lighting device



May 17, 1938- H. A. DOUGLAS 2,117,760

ELECTRIC LIGHTING DEVICE Filed April 4, 1936' j Harr A.Dau31as INVLNTOR Bwmm,

AT TORNEYS Patented May 17, 1938 l N UNITED STATES 2,111,760 Ewcrmc LIGHTING nEvrca Harry A. Douglas, Bronson, Mich., assignor to Kingston Products Corporation, a corporation of Indiani Y Application ,April 4, 1938, Serial No. 72,777

8 Claims. (Cl. 240-4!) My invention relates to electric lighting de` vices, and more particularly to electric lamp units comprising an incandescent electric lamp mount-4 ed in a reflector, as for example, in an automobile headlight,4 and the principal object of my invention is to providea new and improved lightf ing device and a unit of this type.

In the drawing accompanying this speciilcation, and forming a` part of this application, I`

have shown for purposes of illustration, one form which my invention may assume. In this drawing:

Figure lis a vertical sectional view, certain parts being fragmentarily shown, of one embodiment of my invention,

Figure 2 is a side elevation, partly fragmentary, of the parts of Figure 1, partly disassembled,

Figure 3 is a transverse sectional front view of a lamp such as used in the embodiment of Fig-4 ure 1,

Figure il is a rear elevation of a mounting or` reflector such as used in the embodiment of Figure 1, and

Figure 5 is a front elevation of a detail of Figure l.

Referring to Figure 1, the embodiment of my invention here illustrated is shown as including an incandescent electric lamp I0, adapted to be suitably connected to a mounting il, the mounttending positioning means I3. I'he base includes I @shell i4, `and the laterally extending portion of thebase comprises a collar I5 surroundng'the' shelllit, and a radially extending flange i6 on the callan-15. The collar i5 may be fastened to the shellftin any suitable manner, as by solder i1 (seevfigure 3). As may be seen best in Figure 3, the flange I5 is desirably circular in outline, and is provided with, desirably three, axially frontwardlyextending projections I8 formed by making depressions I9 in the rear face of the flange I6. By the term front is meant that side of a part presented toward the light producing source of the lamp- Ill, and by rear the opposite side oi the part. The projections 8 are here shown as ,concentrically disposed and as circumferentially unequally spaced. The lamp ilange "i6 may be further provided with a recess or aperture2il, here shown as in radial alinement with one of the axialprojections I8. y

The reflector I is here shown as provided with a cylindrical po et 2| open at the rearand extending frontwardly, which, in this instance, is

fragmentary in character. The pocket 2| has a plane bottom or end flange V22 having a central aperture 23 smaller than the outside diameter of the lamp ange I6. The end ange 22 is here shown as a flat portion of the crown of the reilector and fragmentarily cut away to form the radially extendingrecesses 2l, 2,5, 28. These recesses leave the end flange 22 inthe `form of three ilat segmental end flanges 21, 28, 28, rear surfaces of which, at least, define a single plane. The end flange 29 is here shown as having a lug 30, extending axially rearwardly from its inner peripheral margin, adapted to llt freely but desirably snugly in the aperture 20 of the lamp flange.

The pocket 2| has a cylindrical portion, which is also fragmentary in character, formed by three arcuate ears 3|, 32, 33, extending rearwardly ionzisthe reflector between the end flanges 21,

The end flanges 21, 28, 29 of the reflector pocket, as may be seen particularly in Figure 4, are here shown as of equal circumferential extent, but the radial axes of symmetry of the upper flanges, 21, 28, as viewed in Figure 4, are less than apart. The radial axis of symmetry of the lower end flange, 29, is on a line bisecting the angle/between the radial axes of symmetry of the upper flanges 21, 28. In the illustrated embodiment the ears 3|, 33 are consequently wider than the ear 32; and the ears are also circumferentially unequally spaced, as are also pins 34, here shown as extending radially outwardly from the circumferential centers of the ears. The pins 34 may be conveniently formed by locally pressing 'ut the inner periphery of each ear to form an indentation such as 35.

The inner cylindrical periphery of the pocket 2| (that is, the cylindrical surface defined by the inner peripheral surfaces of theears 3|, 32, 33) is of such diameter that the circular peripheral margin of the lamp flange I6 will, desirably, be gaged thereby, that is, snugly ilt in the pocket, when the axial projections I8 on the lamp flange I6 are in engagement with the rear surfaces of the end anges 21, 28, 29, of the pocket 2|.

When the lamp I0 is in the position shown in Figure 1, the lug 30 on the mounting flange 22 is positioned in the aperture 20 in the lamp flange I6. The circumferential extent of the aperture 20 is desirably very little greater than the width of the lug 30, so that the interengagement of the lug and aperture will accurately position the lamp l0 rotatively with respect to the reflector IThe lamp I6 may be held with the axial projections I6 on the lamp flange in abutment with the end flanges 21, 26, 29, by means here shown as a contact carrier 36.

The contact carrier 36 comprises a cylindrical shell 31 provided at its front end with a hollow generally cylindrical enlargement 36, joined to the shell 31 by an integral radial flange 36. The cylindrical enlargement 36 may be left completely cylindrical, that is, completely annular in cross-`- Apins 34, so that when the contact carrier 36 is assembled with the reflector I I, as shown in Figure 1, the pins 34 will be in engagement with the seats 43.

The contact carrier 36 also includes an insulating member 44, having an outside diameter approximately the same as the inside diameter of the shell 31, adapted to abut diametrically opposite segmental flanges 45 extending radially inwardly from the rear end of the shell 31. The insulating member 44 is further provided with a plurality of circumferentially spaced radial projections, in this instance three, two of which, 46, 41, may be seen in Figure 2, and the third of which, 46, is located at the other side of the member 44, analogously to the projection 46. On opposite circumferential sides of the projection 41 are disposed two rearwardly extending projections 49, 56 on the shell 31. Immediately below the projections 46, 46, as viewed in Figure 2, the shell 31 is provided with the respective rearward projections 5I, 52. The space between the projections 5I, 52 is less than between the projections 43, 56. The projections 46, 41, 46, and the projections 46, 56, 5I, 52 may be arranged in any other suitable manner, or any other suitable means may be adopted, so that the insulating member 44 and the shell 31 may be assembled in but one Irelative rotative relation. In order to hold the insulating member 44 assembled with the shell 31 a desirable number of axially extending fingers 53 may be provided at theA rear ends of the projections 49, 56, 5I, 52, the ilngers 53 being clinched radially inwardly over the rear face of the insulating member 44.

The insulating member 44 is adapted to carry contacts 54, 55, these contacts being desirably formed as enlarged heads on Shanks tted over and swedged to the ends of conductors 56, 51. The conductors 56, 51 are disposed in sleeves 56, each sleeve being slidable within a bushing 59, which is flxedly mounted in any suitable manner, as by beading, through the insulating member 44. Each sleeve 56 is surrounded by va spring 66, between the bushing 56 of the sleeve 56, and a flange 6I, on each sleeve, abutting the respective contacts, 54, 55.

In the position shown in Figure 1, the contacts 54, `55 of the contact carrier make contact respectively with contacts 52, 63 provided on the lamp base I2. One of these lamp contacts, 62, is not visible, being directly behind the contact 63 visible in Figure 1. The provision of a plurality of contacts 62, 63 on the lamp base enables the use of a multiple filament lamp, the lamp being shown here as provided with two hiaments, one of which, 64, may desirably have its lighting center vat some predetermined point with respect to the reflector, as for example at the focus, and the other of which, 65. may be displacedfrom the filament 64, and may be used for providing dim light or so-called tilted light. The filaments 64, 65 have their terminals connected in a well known manner to the lamp base I2 and to the contacts 62, 63 on the lamp base. The passage of current to either one or both of the filaments 64, 55, may be controlled in any suitable manner, by switching means (not shown) interposed in the conductors 56, 51.

In assembling the lamp I6, reector II, and

vcontact carrier 36, the lamp I6 is ilrst brought to a position, at the rear of the reflector, such that the lamp is coaxial with the reflector aperture 23. the bulb of the lamp passing through the aperture 23 and the flange I6 slipping into the pocket 2l. The lamp I6 is rotationally so positioned that the lug 36 will enter the aperture 26 in the lamp flange, further frontward movement bringing the axial projections I6 into engagement with, in this instance, the circumferential centers of the rear faces of the end flanges 21, 26, 29. The lamp I6 then has the position shown in Figures l and 2. 'Ihe contact carrier 36 is then brought to a position at the rear of the reector, coaxial with the aperture 23, as for example in Figure 2, and is either rst moved frontwardly to slip over the ears 3l.' 32, 33 and against the pins 34 and then-rotated until the pins will enter the bayonet slot entrances 4I, or ilrst rotationally so positioned and then moved frontwardly. The contact carrier 36 is moved frontwardly, as hereinbefore noted, against the bias of the spring pressed contacts 54, 55, and, when the pins 34 reach the ends of the entrances 4I, is rotated clockwise, as viewed from the rear of the reector, until the pins reach the seats 43, whereupon the contact carrier may be released, the contacts 54, 55 acting to firmly press the pins 34 and seats 43 into engagement and hence pressing the axial projections I6 firmly into engagement with the end flanges 21, 26, 26.

It will be evident, since the pins 34 and the bayonet slots 46 are correspondingly unequally circumferentially spaced, that the contact carrier 36 may be assembled with the reflector II in but one relative rotative relation. and consequently the pair of contacts 54, 55, carried by the contact carrier 44 assumes a predetermined rotative relation with respect to the reflector Il, and therefore also with respect to the. lamp I6, since the lamp is rotationally positioned by the lug 36 and aperture 26.

It will be evident that since the lamp flange I6 is accurately pre-positioned with respect to its distance from the illaments 64, 65, and the direction of the plane of the flange I6 is prepositioned with respect to the axis of the lamp I6, the filaments 64, 65 will assume the desired predetermined position with respect to the reflector when the parts are assembled, as in Figure 1.

The mode of removal of the lamp I6 from the 'I'he lamp is then moved frontwardly,

reflector II will be obvious from the hereinbefore described mode of assembly.

The lamp I6 may be assembled'with the positioning means I3 by placing the positioning means on a standard with the shell I4 within the collar I5 and then adjusting the 4lamp until the lighting center of the desired filament thereof is in a predetermined position, whereupon the collar I5 is soldered to the shell Il. The position of `the other filaments of the lamp may be simultaneously predetermined.

It will be evident to those skilled in the art thatin some aspects of the invention it is not essential that the pins 34 be unequally circumferentially spaced, nor is it essential that the ears 3|, 32, 33 be unequal and circumferentially unequally spaced, nor that the end flanges 21, 28, 29 be unequally circumferentially spaced, but that all of these parts may be circumferentially equally spaced. Other variations will readily suggest themselves.

From the foregoing it will be apparent to those skilled in the art that the illustrated embodiment of my invention provides a new and improved electric lighting device and unit, readily and conveniently constructed and assembled. a'nd accordingly, accomplishes the principal object of my invention. On the other hand, it also will be obvious to those skilled in the art that the illustrated embodiment of my invention may be variously changed and modified, or features thereof, singly or collectively embodied in other combinations than those illustrated, without departing from the spirit of my invention, or sacrificing all of the. advantages thereof, and that accordingly, the disclosure herein is illustrative only, and my invention is not limited thereto.4

I claim:

1. In combination: a reflector; an incandescent electric lamp having a base including a laterally extending positioning flange circular in outline, said flange being constructed and arranged to abut said reflector; said reflector having a front side presented" toward the light producing source of said lamp, said flange being seated on the rear side of said reflector; said reflector having flange means extending rearwardly from said rear side of said reflector and disposed about said lamp flange; said flange means being so constructed and arranged that the inner periphery of said flange means defines a circle gaging thc outer periphery of said lamp flange thereby to restrain lateral movement of said lamp flange when said lamp flange is so seated; means pressing said lamp flange into abutment with said rear side of said reflector; said pressing meansin-cluding a portion complementary to said flange means; and said flange means and said portion comprising bayonet connection means for detachably connecting said portion and said flange means.

2. In combination: a mounting; an incandescent electric lamp having a base. and provided with contact means, said base including a lat-` erally extending flange circular in outline; said mounting having a front side presented toward the light producing source of said lamp, and having a pocket of generally circular outline at the rear side of said mounting, said pocket having a generally plane bottom provided with a central aperture larger than said bulb, said flange being seated on said bottom; pressing means, carrying contact means electrically operatively cooperable with said lamp contact means when said pressing means is in a predetermined rotative position with respect to said lamp, so constructed and arranged as to press said flange against said bottom; and said pressing means and said mounting comprising bayonet connection means so constructed and arranged that said pressing means may be connected to said mounting in but one relative rotative relation.

3. In combination: a mounting; an incandescent electric lamp having a base and provided with contact means, said base including a laterally extending flange circular in outline; said mounting having ia front side presented toward `the light producing source of said. lamp, and

having a pocket of generally circular outline at 'the rear side of said mounting, saidpccket having a generally plane bottom provided with a central aperture larger than said bulb, said flange being seated on said bottom; said lamp and said mounting comprising means constructed and arranged to restrain relative rotation of said lamp about its axis with respect to said mounting when said flange isseated on said bottom; pressing means, carrying contact means electrically operatively cooperable with said lamp contact means when said pressing means is in a predetermined rotative position with respect to said lamp, so constructed and arranged as to press said flange against said bottom; and said pressing means and said mounting comprising bayonet connection means so constructed and arranged that said pressing means may be connected to said mounting in but one relative rotative relation.

4. In combination z. a reflector; an incandescent electric lamp including laterally extending positioning means constructed and arranged to abut said reflector; said reflector having a front side presented toward the light producing source of said lamp, said positioning means being seated on the rear side of said reflector; said reflector having an aperture coaxial with said lamp, and a plurality of circumferentially spaced recesses extending radially` outward from the margin of said aperture; said reflector having a plurality of circumferentially spaced projections, extending rearwardly from the general plane defined by the portions of the reflector between said recesses, and disposed at the outer margins of said recesses respectively; said projections being so constructed and arranged that they gage the outer periphery of said positioning means when said positioning means is so seated thereby to restrain lateral movement of said Ypositioning means; and pressing means constructed and arranged to press said positioning means into abutment with said rear side of said reflector.

5. In combination: a reflector; an incandescent electric lamp including a laterally extending positioning flange, circular in outline, constructed and arranged to abut said reflector; said reflector having a front side presented toward the light producing source oi' said lamp, said flange being seated on the rear side of said reflector; said reflector having an aperture coaxial with said lamp, and a plurality of circumferentially spaced recesses extending radially outward from the margin of said aperture; said reflector having a plurality of circumferentially spaced projections, extending rearwardly from the general plane delined by the portions of the reilector betweensaid recesses, and disposed at the outer margins of said recesses respectively; said projections being so constructed and arranged that their inner peripheries define a circle gaging the outer periphery of said flange when said flange is so seated thereby to restrain lateral movement of said flange; and pressing means constructed and arranged to press said flange into abutment with said rear side of said reflector.

6. In combination: a reflector: an incandescent electric lamp including a laterally extending position flange, circular in outline, constructed and arranged to abut said reflector; said reflector having a front side presented toward the light pro-i ducing source of said lamp. said flange being 'seated on the rear side of said reflector; said reflector having an aperture coaxial with said lamp, larger than said bulb and smaller than 'said flange, and having a plurality of circumferentially spaced recesses extending radially outward from the margin of said aperture; said reflector having a plurality of circumferentially spaced projections, extending rearwardly from the general plane defined by the portions of the reflector between said recesses, and disposed at the outer margins of said recesses respectively; said projections being so constructed and arranged that their inner peripheries delinea circle gaging the outer periphery of said flange when said flange is so seated thereby to, restrain lateral movement of said flange; and pressing means constructed and arranged to press said flange into abutment with said rear side of said reflector.

'1. In combination: a reflector; an incandescent electric lamp including laterally extending positioning means constructed and arranged to abut said reflector; said, reflector having a front side presented toward the light producing source of said lamp, said positioning means being seated respectively; said projections being so constructed and arranged that they gage the outer periphery of said positioning means when said positioning means is so seated thereby to restrain lateral movement of said positioning means; pressing means constructed and arranged to press said positioning means into abutment with said rear side of said reflector; and said projections and said pressing means comprising means for detachably connecting said pressing means to said projections.

8. In combination: a reflector; an incandescent electric lamp including a laterally extending positioning flange circular in outline, constructed and arranged to abut said reflector; said reflector having a front side presented toward the light producing source of said lamp, said' flange being seated on the rear side of said reflector; said reflector having an aperture coaxial with said lamp, and a plurality of circumferentially spaced recesses extending radially outward from the margin of said aperture; said reflector having a plurality of circumferentiaily spaced projections, extending rearwardly from the general plane defined by the portions oi' the reflector between said recesses, and disposed at the outer margins of said recesses respectively; said projections being so constructed and arranged that their inner peripheries define a circle gaging the outer periphery of said ange when said flange is so seated thereby to restrain lateral movement oi' said flange; pressing means constructed and arranged to press said positioning means into abutment with said rear side of said reflector; and said projections and said pressing means comprising means for detachably connecting said pressing means and said projections.

HARRY A. DOUGLAS. 

